A5045738528- Chalcogenide Semiconductor Thin Films
- Quantum Dots Synthesis And Properties
- Graphene research and applications
- Advanced Thermoelectric Materials and Devices
- ZnO doping and properties
- Copper-based nanomaterials and applications
- Semiconductor materials and interfaces
- Thermal properties of materials
- Advanced Semiconductor Detectors and Materials
- Quantum and electron transport phenomena
- Molecular Junctions and Nanostructures
- solar cell performance optimization
- Network Security and Intrusion Detection
- 2D Materials and Applications
- Solar Radiation and Photovoltaics
- ECG Monitoring and Analysis
- Nanopore and Nanochannel Transport Studies
- Advanced Sensor and Energy Harvesting Materials
- Photovoltaic System Optimization Techniques
- Conducting polymers and applications
- Electrowetting and Microfluidic Technologies
- Innovative Energy Harvesting Technologies
- Topological Materials and Phenomena
- Thermal Radiation and Cooling Technologies
- Advanced Memory and Neural Computing
University of Dhaka
2024
Bangladesh University of Engineering and Technology
2023-2024
The University of Melbourne
2014-2022
Dhaka University of Engineering & Technology
2015-2021
Activated Research Company (United States)
2020
Data61
2014-2018
Universiti Tenaga Nasional
2018
Victoria University
2016
Princess Sumaya University for Technology
2016
National University of Malaysia
2011-2015
CdS thin films were deposited by three different processes; close spaced vapour transport (CSVT), chemical bath deposition (CBD), and sputtering technique on ITO coated glasses their structural optical properties investigated through XRD, SEM, EDX UV-Vis spectrometry, respectively. The as-grown are annealed at 400°C 500°C for 30 min in air the change with thermal stress also investigated. crystallite grain size, lattice constant, microstrain dislocation densities of quite these processes as...
Thermoelectric properties of Graphene nano-ribbons (GNRs) with nanopores (NPs) are explored for a range pore dimensions in order to achieve high performance two-dimensional nano-scale thermoelectric device. We reduce thermal conductivity GNRs by introducing pores them enhance their performance. The electrical (Seebeck coefficient and conductivity) the device usually degrade inclusion; however, we tune its optimal dimension minimize this degradation, enhancing overall (high ZT value) our...
Zinc oxide (ZnO) thin films were deposited by RF magnetron sputtering onto ITO coated soda-lime glass substrates. The effects of annealing in temperature range 250 to 450 °C on the structural and optical properties ZnO have been studied. crystalline structure, surface topology, morphology, determined using X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron (SEM) UV–Visible Spectrometry, respectively. measurement showed that annealed polycrystalline nature with (002),...
Abstract Quantum dot light‐emitting diodes (QLEDs) represent an exciting new technology that has many desirable attributes when compared to existing organic LEDs (OLEDs) including increased brightness, contrast, and response time. Solution‐based fabrication approaches have the advantage of being able produce large‐area electronic systems at reduced costs critical in applications such as large display electronics on curved surfaces low‐profile augmented reality glasses. In this paper, for...
As an emerging flexible thermoelectric material, polymer composites with embedded carbon nanotube (CNT) networks have shown promising properties, but their transport has not been fully understood. Herein, we CNT in poly(dimethylsiloxane) (PDMS) elastomers and analyzed properties using Landauer theory. We find that the simultaneous increase Seebeck coefficient electrical conductivity increasing content up to ∼40% can be attributed tunneling at junctions gap distance decreasing content. Beyond...
ZnxCd1-xS thin films at low zinc content have been deposited on bare soda lime glass substrates using RF magnetron co-sputtering of CdS and ZnS for the first time to investigate annealing effect structural optical properties films. The as-deposited were annealed in O2/N2 ambient temperature ranging 200-500 °C. composition was controlled by varying power such a ratio so that low. composition, structural, surface morphological investigated EDX, XRD, UV-Vis spectrophotometer FESEM. observed...
An electrostatic power generator converts mechanical energy to electrical by utilising the principle of variable capacitance. This change in capacitance is usually achieved varying gap or overlap between two parallel metallic plates. paper proposes a novel micro where movement an aqueous solution NaCl. A significant due higher than air dielectric constant water and Helmholtz double layer capacitor formed ion separation at electrode interfaces. The proposed device has advantages over...
There have been numerous theoretical studies on exciting thermoelectric properties of graphene nano-ribbons (GNRs); however, most these are mainly based simulations. In this work, we measure and characterize the GNRs compare results with predictions. Our experimental verify that nano-structuring patterning into significantly enhance its power, confirming previous Although in lower conductance (G), overall power factor (S2G) increases for nanoribbons. We demonstrate edge roughness plays an...
Solid-state nanopores are promising candidates for next generation DNA and protein sequencing. However, once fabricated, such devices lack tuneability, which greatly restricts their biosensing capabilities. Here we propose a new class of solid-state graphene-based nanopore that exhibit unique capability self-tuneability, is used to control conductance, tuning it levels comparable the changes caused by translocation single biomolecule, hence, enabling high detection sensitivities. Our...
Artificial neural networks (ANN), deep learning, and neuromorphic systems are exciting new processing architectures being used to implement a wide variety of intelligent adaptive systems. To date, these have been primarily realized using traditional complementary metal–oxide–semiconductor (CMOS) processes or otherwise conventional semiconductor fabrication processes. Thus, the high cost associated with design circuits has limited broader scientific community from applying ideas, arguably,...
This paper presents a new molybdenum disulphide (MoS2) nanodevice that acts as two-terminal field-effect rectifier. The device is an atomically-thin two-dimensional self-switching diode (SSD) can be realized within single MoS2 monolayer with very minimal process steps. Quantum simulation results are presented confirming the device's operation and showing strong non-linear I-V characteristics. Interestingly, shows p-type behavior, in which conduction dominated by holes majority charge...
The thermoelectric performance of graphene nano-ribbons are investigated providing a route to enhance through nano-structuring.
The CdS thin film is widely used for numerous applications such as in optoelectronic devices, solar cells, LEDs, photonics devices etc. ultra-thin layer commonly by or window CdTe, CIS, CIGS, CZTS thin-film cells. has high bandgap of 2.42 eV and transparent after 510 nm wavelength. excellent optoelectronics properties material are very attractive hetero-junction partner (n-type) There several fabrication techniques to deposit Screen Printing, Thermal Evaporation (TE), Molecular Beam Epitaxy...
Investigation on the performance of monoclinic phase copper tin sulfide (CTS) based thin film solar cells has been carried out numerically by AMPS-1D simulation software. Based proposed cell structure, influence carrier concentration and thickness both absorber buffer layers as well work function back contact metal are studied to enhance output CTS cell. The effect operating temperature is also tested for ensure sustainability at outdoor installation. After optimizing layers, best delivers...
This paper presents the significant role deposition pressure plays in of high quality ITO films by RF magnetron sputtering. target was sputtered onto bare sodalime glass under various conditions. Particularly, varied against several other parameters, until best film characteristics were obtained. The deposited characterized using FESEM, AFM, XRD, UV-Vis and four-point probe. Results indicate that obtaining good films. grains change dramatically with pressure, having lower giving better...
Cadmium Zinc Telluride (CZT) films were deposited by co-sputtering of CdTe and ZnTe targets in an RF magnetron sputtering using various combinations powers, the effect power on properties CZT studied SEM, EDX, XRD, AFM UV-VIS spectrophotometer. The SEM data shows that as ratio CdTe: increases, so does grains size surface roughness samples. From EDX results, it was found amount Zn ternary reduces with ratio. optical analyses indicate they have good absorption; shallow absorption edge occurs...